In Wisconsin all persons who are at least 12 years of age and who were born on or after January 1, 1985 are required to take a Wisconsin-Approved Snowmobile Safety Course, and obtain a snowmobile safety certificate when riding on public lands. Riders under the age of 12 are not required to carry a certificate, however these riders MUST be accompanied (on the same snowmobile) by a parent or guardian at all times when riding in public areas.